Fire extinguishing device, energy storage box and fire extinguishing method

Abstract

A fire extinguishing device, comprising a pressure storage tank (1) filled with a compressed inert gas, wherein the pressure storage tank is in communication with one end of an one-way valve (3) by means of a gas feeding pipe (2), the other end of the one-way valve is in communication with one end of a telescopic inflation pipe (4), and a flexible fire detection pipe (5) is arranged on the outside of the telescopic inflation pipe, one end of the flexible fire detection pipe being in sealed connection with a surface of the one-way valve, and the other end of the flexible fire detection pipe being closed; a pouch (6) filled with a liquid fire extinguishing agent is provided inside the flexible fire detection pipe; and a pressure-relief diaphragm (7) is arranged at the position where the one-way valve communicates with the telescopic inflation pipe. When the fire extinguishing device is not activated, the pouch is filled with the liquid fire extinguishing agent, and one side of the pouch presses the telescopic inflation pipe in a contracted state against one side of the pressure-relief diaphragm. The fire extinguishing device enables an increased spraying rate of the liquid fire extinguishing agent, thereby improving the fire extinguishing efficiency and also achieving the effect of continuous inhibition of battery thermal runaway. The present invention further relates to an energy storage box and a fire extinguishing method.

Description

Fire extinguishing device, energy storage tank and fire extinguishing method TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage tank fire extinguishing, and particularly relates to a fire extinguishing device, an energy storage tank and a fire extinguishing method. BACKGROUND

[0002] Energy storage is a key supporting technology for energy structure adjustment and power system transformation under the new energy wave. Lithium ion batteries, as new energy batteries, are more environmentally friendly and have superior performance, and are widely used in energy storage power stations. The lithium battery assembly energy storage tank solution is widely used in new energy power generation access and consumption, realizes distributed power generation and microgrid energy storage, provides reliable power supply and power quality for power system frequency and voltage regulation, and provides reliable power supply and power quality in power distribution system upgrading and reconstruction. However, lithium ion batteries may heat up during storage due to their own chemical reactions or external heat sources, which may cause thermal runaway, thereby seriously affecting the safety performance of the energy storage tank. At present, most energy storage tanks are provided with corresponding fire extinguishing devices (such as liquid fire extinguishing agents) to solve the problem of battery thermal runaway. However, the liquid fire extinguishing agent of the fire extinguishing device cannot be quickly sprayed out when sprayed, and the spraying rate is slow, resulting in low fire extinguishing efficiency, and the fire extinguishing process of the liquid fire extinguishing agent cannot continuously suppress the occurrence of battery thermal runaway. SUMMARY

[0003] The present application aims to overcome the above-mentioned deficiencies, and provides a fire extinguishing device, an energy storage tank and a fire extinguishing method to solve the problems in the background art.

[0004] To solve the above technical problems, the technical solution adopted by the present application is as follows: a fire extinguishing device, comprising a pressure storage tank filled with compressed inert gas, the pressure storage tank is in communication with one end of a one-way valve through a gas delivery pipe, the other end of the one-way valve is in communication with one end of a telescopic inflation tube, a flexible fire detection tube is arranged outside the telescopic inflation tube, one end of the flexible fire detection tube is in sealing connection with the surface of the one-way valve, and the other end of the flexible fire detection tube is closed, a bag filled with liquid fire extinguishing agent is arranged in the flexible fire detection tube, and a pressure relief diaphragm is arranged at the position where the one-way valve is in communication with the telescopic inflation tube; when the fire extinguishing device is not started, the bag is filled with liquid fire extinguishing agent, and one side of the bag presses the telescopic inflation tube in the contracted state against one side of the pressure relief diaphragm.

[0005] Preferably, the liquid fire extinguishing agent is perfluorohexanone.

[0006] Preferably, one end of the telescopic inflation tube is in communication with the one-way valve, and the other end of the telescopic inflation tube is closed, the telescopic inflation tube is in the structure of a rubber sleeve or a bellows tube.

[0007] In addition, the present application discloses an energy storage tank using the above-mentioned fire extinguishing device, comprising a tank body and a battery arranged in the tank body, a flexible fire detection tube is arranged above the battery, and a pressure storage tank is arranged on the inner side or the outer side of the tank body.

[0008] Further, the box is a square structure, and a plurality of batteries are uniformly arranged in the box, and the flexible fire detecting tube is arranged in a serpentine or S-shaped pipeline above the batteries.

[0009] Further, the flexible fire detecting tube is fixed to the top of the battery by the clamping block.

[0010] Further, the bottom of the box is further provided with an exhaust hole.

[0011] In addition, the application discloses a fire extinguishing method of the energy storage box, which comprises the following steps.

[0012] S1, when the temperature of the battery in the energy storage box is too high or a fire occurs, the flexible fire detecting tube is broken at a position with high temperature;

[0013] S2, the bag at the broken position is also broken due to heat, so that the liquid extinguishing agent in the bag flows out, and a first fire extinguishing process is started;

[0014] S3, after the liquid extinguishing agent in the bag flows out, the pressure of the pressure relief diaphragm against one side of the telescopic inflatable tube is lost, and the pressure relief diaphragm is broken by the inert gas in the gas feeding pipe under the action of the pressure difference between the two sides;

[0015] S4, the inert gas enters the telescopic inflatable tube, and the telescopic inflatable tube gradually extends from the original telescopic state, and continuously pushes the bag in the extending process, so that the liquid extinguishing agent in the bag is quickly extruded out, and the spraying process of the liquid extinguishing agent is accelerated;

[0016] S5, when the telescopic inflatable tube extends to the broken position of the flexible fire detecting tube, if high temperature or flame still exists outside, the telescopic inflatable tube will also be broken at the position, so that the inert gas in the telescopic inflatable tube is sprayed out, and a second fire extinguishing process is started.

[0017] The application has the following beneficial effects: after the inert gas enters the telescopic inflatable tube, the telescopic inflatable tube gradually extends from the original telescopic state, and continuously pushes the bag in the extending process, so that the liquid extinguishing agent in the bag is quickly extruded out, and the spraying process of the liquid extinguishing agent is accelerated, and the fire extinguishing efficiency is improved; in addition, when the telescopic inflatable tube extends to the broken position of the flexible fire detecting tube, if high temperature or flame still exists outside, the telescopic inflatable tube will also be broken at the position, so that the inert gas in the telescopic inflatable tube is sprayed out, and a second fire extinguishing process is started, and the battery heat runaway phenomenon can be continuously inhibited. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic view of a fire extinguishing device;

[0019] Figure 2 is a perspective view of a box body of an energy storage box;

[0020] Figure 3 is a schematic view of the installation structure of the gas delivery pipe, the pressure relief diaphragm, the telescopic inflatable tube and the bag body when the fire extinguishing device is not activated;

[0021] Figure 4 is a schematic view of the structure of the flexible fire detection tube and the bag body after the fire extinguishing device is activated and the bag body is broken;

[0022] Figure 5 is a schematic view of the telescopic inflatable tube gradually extending from the original telescopic state after the pressure relief diaphragm is broken;

[0023] Figure 6 is a schematic view of the structure of the telescopic inflatable tube after it is broken;

[0024] Figure 7 is a schematic view of the structure of the clamping block. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0026] As shown in Figures 1-7, a fire extinguishing device includes a pressure storage tank 1 filled with compressed inert gas, the pressure storage tank 1 is in communication with a one-way valve 3 at one end through a gas delivery pipe 2, the other end of the one-way valve 3 is in communication with one end of a telescopic inflatable tube 4, the telescopic inflatable tube 4 is provided with a flexible fire detection tube 5 on the outside, one end of the flexible fire detection tube 5 is in sealing connection with the surface of the one-way valve 3 and the other end is closed, the flexible fire detection tube 5 is provided with a bag body 6 filled with liquid fire extinguishing agent inside, and a pressure relief diaphragm 7 is arranged at the position where the one-way valve 3 is in communication with the telescopic inflatable tube 4; when the fire extinguishing device is not activated, the bag body 6 is filled with liquid fire extinguishing agent, and one side of the bag body 6 presses the telescopic inflatable tube 4 in the contracted state on one side of the pressure relief diaphragm 7.

[0027] Preferably, the liquid fire extinguishing agent is perfluorohexanone.

[0028] Preferably, one end of the telescopic inflatable tube 4 is in communication with the one-way valve 3 and the other end is closed, and the telescopic inflatable tube 4 is in the structure of a rubber sleeve or a bellows.

[0029] More preferably, the flexible fire detection tube 5 in the present embodiment is the pipe structure of the fire detection tube seen in the market.

[0030] In addition, the present application discloses an energy storage box using the above-mentioned fire extinguishing device, which includes a box body 8 and a battery 9 arranged in the box body 8, the battery 9 is provided with the flexible fire detection tube 5 above, and the pressure storage tank 1 is arranged on the inside or outside of the box body 8.

[0031] Further, the box body 8 is in the structure of a square, and a plurality of batteries 9 are uniformly arranged inside, and the flexible fire detection tube 5 is in the form of a serpentine pipe or an S-shaped pipe distributed above the batteries 9 (as shown in Figure 1). This distribution mode can maximize the fire detection range of the flexible fire detection tube 5.

[0032] Further, as shown in Fig. 7, the flexible fire detecting tube 5 is fixed on the top of the battery 9 by the clamping block 10. The flexible fire detecting tube 5 can be fixed on the battery 9 by the clamping block 10 to prevent displacement during storage and transportation. As shown in the figure, the upper and lower U-shaped grooves in the clamping block 10 can fix the flexible fire detecting tube 5.

[0033] Further, the bottom of the box 8 is also provided with an exhaust hole. In this way, the combustible gas and liquid in the box 8 can be discharged in time through the exhaust hole to prevent the combustible gas and liquid from accumulating in the box 8.

[0034] In addition, the application discloses a fire extinguishing method of the energy storage box, which comprises the following steps:

[0035] S1. When the temperature of the battery 9 in the energy storage box is too high or a fire occurs, the flexible fire detecting tube 5 breaks at a position with high temperature (as shown in Fig. 4) ;

[0036] S2. The bag 6 at the broken position also breaks due to heat, so that the liquid extinguishing agent in the bag 6 flows out, starting the first fire extinguishing process (as shown in Fig. 4) ;

[0037] S3. After the liquid extinguishing agent in the bag 6 flows out, the pressure of the pressure relief diaphragm 7 on one side of the telescopic inflatable tube 4 is lost, and the pressure relief diaphragm 7 is broken by the inert gas in the gas feeding tube 2 under the action of the pressure difference between the two sides (as shown in Fig. 5) ;

[0038] S4. The inert gas enters the telescopic inflatable tube 4, and the telescopic inflatable tube 4 gradually extends from the original telescopic state, continuously pushing the bag 6 in the process of extension, so as to quickly extrude the liquid extinguishing agent in the bag 6 (as shown in Fig. 5), accelerating the spraying process of the liquid extinguishing agent; the liquid extinguishing agent in the bag 6 has no pressure itself, and if it is to be completely discharged from the bag 6, an external pushing force is needed, such as a gas pushing force or a mechanical pressure. If the gas directly pushes the liquid extinguishing agent in the bag 6 to discharge, part of the gas may directly discharge from the broken position, resulting in gas leakage and weakening the gas pushing force, so that the liquid extinguishing agent cannot be quickly discharged from the bag 6. Therefore, the application adopts a mechanical pressure mode, that is, the inert gas first enters the telescopic inflatable tube 4, and then the telescopic inflatable tube 4 is elongated to mechanically push the bag 6, which is similar to the effect of a piston pushing. In this way, when the telescopic inflatable tube 4 is elongated to the broken position of the flexible fire detecting tube 5, the liquid extinguishing agent in the front bag 6 can be immediately discharged, realizing the function of quickly extinguishing the fire.

[0039] S5, if the outside still exists high temperature or flame when the telescopic inflatable tube 4 is elongated to the position where the flexible fire tube 5 is broken, the telescopic inflatable tube 4 will also be broken at the position (as shown in Fig. 6), so that the inert gas inside is sprayed out, and the second fire extinguishing process is carried out.

[0040] The above-described embodiments are merely preferred technical solutions of the present application, and should not be regarded as a limitation on the present application. The protection scope of the present application should be based on the technical solutions described in the claims, and include equivalent replacement solutions of the technical features described in the claims. That is, equivalent replacement improvements within this range are also within the protection scope of the present application.

Claims

1. A fire extinguishing device comprising a pressure storage tank (1) filled with compressed inert gas, characterized in that: The pressure storage tank (1) is connected to one end of a one-way valve (3) through an air supply pipe (2), and the other end of the one-way valve (3) is connected to one end of a telescopic inflation pipe (4). A flexible fire detection pipe (5) is provided on the outside of the telescopic inflation pipe (4). One end of the flexible fire detection pipe (5) is sealed and connected to the surface of the one-way valve (3), and the other end is closed. A bag body (6) filled with liquid fire extinguishing agent is provided in the flexible fire detection pipe (5). A pressure relief diaphragm (7) is provided at the position where the one-way valve (3) and the telescopic inflation pipe (4) are connected. When the fire extinguishing device is not activated, the bag body (6) is filled with liquid fire extinguishing agent, and one side of the bag body presses the telescopic inflation pipe (4) in a contracted state against one side of the pressure relief diaphragm (7).

2. A fire extinguishing device according to claim 1, characterized in that: The liquid fire extinguishing agent is perfluorohexanone.

3. A fire extinguishing device according to claim 1, characterized in that: One end of the telescopic inflation tube (4) is in communication with the one-way valve (3), and the other end is closed. The telescopic inflation tube (4) is a rubber sleeve structure or a bellows structure.

4. An energy storage box using the fire extinguishing device according to claim 1, comprising a box body (8) and a battery (9) arranged in the box body (8), characterized in that: A flexible fire detection tube (5) is arranged above the battery (9), and a pressure storage tank (1) is arranged inside or outside the box (8).

5. The energy storage box according to claim 4, characterized in that: The box (8) is a square structure, and a plurality of batteries (9) are evenly arranged inside the box. The flexible fire detection tube (5) is distributed above the battery (9) in the form of a serpentine pipe or an S-shaped pipe.

6. The energy storage box according to claim 4, characterized in that: The flexible fire detection tube (5) is fixed to the top of the battery (9) via a clamping block (10).

7. The energy storage box according to claim 4, characterized in that: The bottom of the box body (8) is also provided with an exhaust hole.

8. A fire extinguishing method for an energy storage box according to any one of claims 4 to 7, characterized in that: It includes the following steps: S1. When the temperature of the battery (9) in the energy storage box is too high or a fire occurs, the flexible fire detection tube (5) breaks at a position with a higher temperature; S2, the bag body (6) at the rupture position will also rupture due to the heat, thereby causing the liquid fire extinguishing agent inside the bag body (6) to flow out, starting the first fire extinguishing process; S3. After the liquid fire extinguishing agent in the bag body (6) flows out, the pressure relief diaphragm (7) loses pressure on the side that contacts the telescopic inflation tube (4). Under the action of the pressure difference on both sides, the pressure relief diaphragm (7) is broken by the inert gas in the air supply tube (2); S4, the inert gas enters the telescopic inflation tube (4), and the telescopic inflation tube (4) gradually extends from the original telescopic state, and continuously pushes the bag body (6) during the extension process, thereby quickly squeezing out the liquid fire extinguishing agent in the bag body (6), accelerating the spraying process of the liquid fire extinguishing agent; S5. When the telescopic inflatable tube (4) is extended to the rupture position of the flexible fire detection tube (5), if there is still high temperature or flame in the outside, the telescopic inflatable tube (4) will also rupture at this position, so that the inert gas inside will be ejected, and the second fire extinguishing process will be carried out.

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